set aconfig_declarations containers to system

Bug: 330354107
Test: CI

Flag: NONE

Ignore-AOSP-First: It is easier to detect all the mismatch in internal
master.

Change-Id: Ic1af43cf291fce8845011f083cef21a67bc6aab9
diff --git a/packages/SystemUI/aconfig/accessibility.aconfig b/packages/SystemUI/aconfig/accessibility.aconfig
index 866aa89..8137e40 100644
--- a/packages/SystemUI/aconfig/accessibility.aconfig
+++ b/packages/SystemUI/aconfig/accessibility.aconfig
@@ -1,4 +1,5 @@
 package: "com.android.systemui"
+container: "system"
 
 # NOTE: Keep alphabetized to help limit merge conflicts from multiple simultaneous editors.